CVE-2025-68664

Описание

LangChain is a framework for building agents and LLM-powered applications. Prior to versions 0.3.81 and 1.2.5, a serialization injection vulnerability exists in LangChain's dumps() and dumpd() functions. The functions do not escape dictionaries with 'lc' keys when serializing free-form dictionaries. The 'lc' key is used internally by LangChain to mark serialized objects. When user-controlled data contains this key structure, it is treated as a legitimate LangChain object during deserialization rather than plain user data. This issue has been patched in versions 0.3.81 and 1.2.5.

A flaw was found in LangChain, a framework for building agents and LLM-powered applications. A remote attacker can exploit a serialization injection vulnerability in LangChain's dumps() and dumpd() functions. This occurs because the functions do not properly escape dictionaries containing the internal 'lc' key during serialization. When user-controlled data includes this key structure, it is incorrectly processed as a legitimate LangChain object during deserialization, potentially leading to arbitrary code execution.